CN201805228U - Special low-voltage active power filter for tobacco industry - Google Patents
Special low-voltage active power filter for tobacco industry Download PDFInfo
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- CN201805228U CN201805228U CN2010205027830U CN201020502783U CN201805228U CN 201805228 U CN201805228 U CN 201805228U CN 2010205027830 U CN2010205027830 U CN 2010205027830U CN 201020502783 U CN201020502783 U CN 201020502783U CN 201805228 U CN201805228 U CN 201805228U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
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Abstract
The utility model discloses a special low-voltage active power filter for tobacco industry, which comprises a circuit breaker, a high-pass passive filtering unit, a three-phase iron core reactor, a three-phase bridge type inverse circuit and an energy storage loop which are sequentially connected and also comprises a control loop, wherein the three-phase iron core reactor and the three-phase bridge type inverse circuit form a three-phase voltage source type inverse loop, the input end of the control loop is connected with the output end of the circuit breaker, and the output end of the control loop is connected with the control end of the low-voltage three-phase voltage source type inverse loop. The special low-voltage active power filter for tobacco industry of the utility model has simple structure, thereby lowering the cost of the existing special low-voltage active power filter for tobacco industry.
Description
Technical field
The utility model relates to a kind of filter, relates in particular to the special-purpose low-voltage active electric power filter of a kind of tobacco business.
Background technology
In recent years, along with development of science and technology and development of technology, the application of nonlinear loads such as rectifier, RHVC, Switching Power Supply, ups power is increasing in the tobacco business power distribution network.Improving enterprises production efficiency, when bringing economic benefit, the various disturbance compositions in the electrical network are being increased, the quality of power supply of electrical network descends day by day.In rising trend because of the distribution accident that power quality problem causes, caused influence and harm in various degree for generating, transmission of electricity, distribution and power device and equipment.
At present cigar mill's power quality problem has been subjected to extensive attention, and wherein the reactive power that causes of nonlinear load increases and harmonic problem is a power quality problem the most general in the electric power system, and the stable operation of electrical network and power consumption equipment is arrived in serious harm.
Reactive power mainly contains the following aspects to the influence of electrical network:
1) increases place capacity.The increase of reactive power can make the capacity of generator, transformer and other electric equipment capacity and lead increase;
2) equipment and line loss increase;
3) voltage drop of circuit and transformer is increased, the variation of reactive power also can cause the fluctuation of line voltage, makes some power consumption equipments can't operate as normal, reduces power supply quality.
Harmonic wave mainly contains the following aspects to the influence of electric power system and other power consumption equipment:
1) increased the possibility of system resonance greatly.Harmonic wave makes easily parallel resonance or series resonance takes place between electrical network and the compensation condenser.Make harmonic current amplify several times even tens of times, cause overcurrent, cause the damage of capacitor, the reactor that is attached thereto and resistor.
2) make the equipment in the electrical network produce additional harmonic loss, reduce the service efficiency of generating, transmission of electricity and power consumption equipment, increase grid line loss.In three-phase four-wire system, zero line can cause zero line overheated owing to flow through a large amount of 3 times and multiple subharmonic currents, even initiation fire.
3) thus harmonic wave can produce extra thermal effect to be caused and power consumption equipment (electric rotating machine, capacitor, transformer) heating makes ageing of insulation, reduce the useful life of equipment.
4) harmonic wave can cause some protection equipment malfunctions works, as relaying protection, and fuse etc.
5) harmonic wave can cause the electrical measuring instrument metering inaccurate.
6) harmonic wave produces interference by modes such as electromagnetic induction and conduction couplings to contiguous electronic equipment and communication system, reduces signal transfer quality, destroys the normal delivery of signal even defective communication equipment.
Tobacco business is carried out harmonic wave for distribution suppress and reactive power compensation, improve the quality of power supply, become the common problem of paying close attention to of power supply department and user.Generally speaking, harmonic wave suppresses and reactive power compensation has two kinds of schemes: (1), installing compensation arrangement, as shown in Figure 1, between nonlinear load 3 and electric power system, add instrument transformer 2 and low-voltage active electric power filter 1, wherein, instrument transformer 2 is used to detect the input current of nonlinear load 3, low-voltage active electric power filter 1 is analyzed instrument transformer 2 detected electric currents, generate the current feedback opposite to electric power system with harmonic wave equal and opposite in direction, the direction of nonlinear load 3 generations, make the waveform of the alternating current of electric power system be sinusoidal wave, thus the harmonic carcellation component.(2), make it meet relevant regulations to the equipment transformation of inserting electrical network.Existing device is transformed, and the current transformer that design did not produce or produced less as far as possible reactive power and harmonic wave can tackle the problem at its root, but the whole costs of transforming of existing apparatus are excessive.Therefore people pay close attention to the less relatively compensation arrangement of cost very much.
The utility model content
The purpose of this utility model is to provide a kind of lower-cost tobacco business simple in structure special-purpose low-voltage active electric power filter.
For achieving the above object, the utility model provides a kind of tobacco business special-purpose low-voltage active electric power filter, comprise the circuit breaker, high pass passive filtering unit, tri-phase iron core reactor, three-phase inverter bridge circuit and the tank circuit that connect successively, and control loop, described tri-phase iron core reactor and described three-phase inverter bridge circuit constitute three-phase voltage source formula inversion circuit, the input of described control loop is connected with the output of described circuit breaker, and its output is connected with the control end of described low pressure three-phase voltage source formula inversion circuit.
The special-purpose low-voltage active electric power filter of tobacco business of the present utility model, described control loop are used for extracting the harmonic component of the load current of nonlinear load, send it to described three-phase inverter bridge circuit.
The special-purpose low-voltage active electric power filter of tobacco business of the present utility model, described three-phase inverter bridge circuit is used for generating extremely described tri-phase iron core reactor of the offset current opposite with its equal and opposite in direction, direction according to described harmonic component, wherein, described tank circuit is as the voltage source of described three-phase inverter bridge circuit.
The special-purpose low-voltage active electric power filter of tobacco business of the present utility model, described tri-phase iron core reactor is used for the harmonic component of the offset current of the described three-phase inverter bridge circuit generation of filtering, and exports the offset current that obtains after the filtering to the three-phase alternating current electrical network.
The special-purpose low-voltage active electric power filter of tobacco business of the present utility model, described high pass passive filtering unit is used for the switch high-frequency component that filtering is produced by described three-phase inverter bridge circuit from the offset current of described tri-phase iron core reactor, and the offset current that obtains after the Filtering Processing is added to is used for three-phase alternating current, thereby form the compensating circuit of a closed loop to nonlinear load power supply; Described high pass passive filtering unit comprises first air core reactor, second air core reactor, the 3rd air core reactor, the 4th resistance, the 5th resistance, the 6th resistance, first electric capacity, second electric capacity and the 3rd electric capacity, described first air core reactor, the output of described second air core reactor and described the 3rd air core reactor is connected with an end of described first contactor, described first air core reactor, the input of described second air core reactor and described the 3rd air core reactor is connected with the output of described tri-phase iron core reactor, described the 4th resistance, described the 5th resistance, corresponding and described first electric capacity of one end of described the 6th resistance, the one end serial connection of described second electric capacity and described the 3rd electric capacity, described the 4th resistance, described the 5th resistance, the other end of described the 6th resistance is connected with the output of described tri-phase iron core reactor, described first electric capacity, the other end of described second electric capacity and described the 3rd electric capacity also connects.
The special-purpose low-voltage active electric power filter of tobacco business of the present utility model, comprise that also the one end is connected with the output of described circuit breaker, and first contactor that the other end is connected with the output of described high pass passive filtering unit, the described first contactor two ends also are connected to the soft start unit, described soft start unit is by first charging resistor, second charging resistor, the 3rd charging resistor, and respectively with described first charging resistor, second contactor that described second charging resistor is connected with described the 3rd charging resistor is formed, described first charging resistor, described second charging resistor is connected with the output of described circuit breaker with described the 3rd charging resistor, and described second contactor is connected with described high pass passive filtering unit output; Described soft start unit is used for coming limiting starting current by the closure that postpones described first contactor.
The special-purpose low-voltage active electric power filter of tobacco business of the present utility model comprises the circuit breaker that connects successively, high pass passive filtering unit, the tri-phase iron core reactor, three-phase inverter bridge circuit and tank circuit, and control loop, tri-phase iron core reactor and three-phase inverter bridge circuit constitute three-phase voltage source formula inversion circuit, the input of control loop is connected with the output of circuit breaker, its output is connected with the control end of low pressure three-phase voltage source formula inversion circuit, therefore its structure has reduced the cost of the special-purpose low-voltage active electric power filter of existing tobacco business than for simple.
Description of drawings
Fig. 1 is the theory diagram of the special-purpose low-voltage active electric power filter of tobacco business of the present utility model;
Fig. 2 is the circuit theory diagrams of the special-purpose low-voltage active electric power filter of tobacco business of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail:
With reference to shown in Figure 2, the special-purpose low-voltage active electric power filter of tobacco business of the present utility model comprises the circuit breaker Q F1 that connects successively, the first contactor KM1, high pass passive filtering unit 202, tri-phase iron core reactor L4, three-phase inverter bridge circuit 203 and tank circuit 204, and control loop 205, the two ends of the first contactor KM1 also are connected to soft start unit 201, tri-phase iron core reactor L4 and three-phase inverter bridge circuit 203 constitute three-phase voltage source formula inversion circuit 206, the input of control loop 205 is connected with the output of circuit breaker Q F1, the control connection of its output and low pressure three-phase voltage source formula inversion circuit 206.Wherein:
Circuit breaker Q F1 is as the on-off switch that is used for to the three-phase alternating current of nonlinear load power supply, and control loop 205 is used for extracting the harmonic component of the load current of nonlinear load, sends it to three-phase inverter bridge circuit 203.
Three-phase inverter bridge circuit 203 is used for generating the offset current opposite with harmonic component equal and opposite in direction, direction to tri-phase iron core reactor L4 according to this harmonic component, and wherein, tank circuit 204 is used as the voltage source of three-phase inverter bridge circuit 203.Three-phase inverter bridge circuit 203 comprises an IGBT Q1, the 2nd IGBT Q2, the 3rd IGBT Q3, the 4th IGBT Q4, the 5th IGBT Q5, the 6th IGBT Q6, the 4th capacitor C 4, the 5th capacitor C 5 and the 6th capacitor C 6 in the present embodiment.The emitter of the one IGBT Q1 is connected the back and is connected with the input of tri-phase iron core reactor L4 with the collector electrode of the 4th IGBT Q4, the emitter of the 2nd IGBT Q2 is connected the back and is connected with the input of tri-phase iron core reactor L4 with the collector electrode of the 5th IGBT Q5, the emitter of the 3rd IGBT Q3 is connected the back and is connected with the input of tri-phase iron core reactor L4 with the collector electrode of the 6th IGBT Q6,4 cross-over connections of the 4th capacitor C are between the emitter of the collector electrode of an IGBT Q1 and the 4th IGBT Q4,5 cross-over connections of the 5th capacitor C are between the emitter of the collector electrode of the 2nd IGBT Q2 and the 5th IGBT Q5, and 6 cross-over connections of the 6th capacitor C are between the emitter of the collector electrode of the 3rd IGBT Q3 and the 6th IGBTQ6.And tank circuit 204 comprises the 7th resistance R 7, electrochemical capacitor C7 and the 3rd contactor KM3, the 3rd contactor KM3 is connected in series with the 7th resistance R 7, the collector electrode of the one IGBT Q1, the collector electrode of the 2nd IGBT Q2, the collector electrode of the 3rd IGBTQ3, the positive pole of electrochemical capacitor C7, the other end of the 3rd contactor KM3 connects together, the emitter of the 4th IGBT Q4, the emitter of the 5th IGBT Q5, the emitter of the 6th IGBT Q6, the negative pole of electrochemical capacitor C7, the other end of the 7th resistance R 7 connects together, the grid of an IGBT Q1, the grid of the 2nd IGBT Q2, the grid of the 3rd IGBT Q3, the grid of the 4th IGBT Q4, the grid of the 5th IGBT Q5, the grid of the 6th IGBT Q6 is connected with the output of control loop 205 respectively.
Tri-phase iron core reactor L4 is used for the harmonic component of the offset current of filtering three-phase inverter bridge circuit 203 generations, and exports the offset current that obtains after the filtering to the three-phase alternating current electrical network.
High pass passive filtering unit 202 is used for the switch high-frequency component that filtering is produced by the IGBT of three-phase inverter bridge circuit 203 from the offset current of tri-phase iron core reactor L4, and the offset current that obtains after the Filtering Processing is added to is used for three-phase alternating current, thereby form the compensating circuit of a closed loop to nonlinear load power supply.The high pass passive filtering unit 202 of this example comprises the first air core reactor L1, the second air core reactor L2, the 3rd air core reactor L3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, first capacitor C 1, second capacitor C 2 and the 3rd capacitor C 3.The first air core reactor L1, the output of the second air core reactor L2 and the 3rd air core reactor L3 is connected with the end of the first contactor KM1, the first air core reactor L1, the input of the second air core reactor L2 and the 3rd air core reactor L3 is connected with the output of tri-phase iron core reactor L4, the 4th resistance R 4, the 5th resistance R 5, corresponding and first capacitor C 1 of one end of the 6th resistance R 6, the one end serial connection of second capacitor C 2 and the 3rd capacitor C 3, the 4th resistance R 4, the 5th resistance R 5, the other end of the 6th resistance R 6 is connected with the output of tri-phase iron core reactor L4, first capacitor C 1, the other end of second capacitor C 2 and the 3rd capacitor C 3 also connects.
The first contactor KM1 is as the part in this closed loop compensation loop, and it is controlled by the soft start unit 201 that is used to postpone its closing time.The soft start unit 201 of this example is by the first charging resistor R1, the second charging resistor R2, the 3rd charging resistor R3, and form with the second contactor KM2 that the first charging resistor R1, the second charging resistor R2 are connected with the 3rd charging resistor R3 respectively, the first charging resistor R1, the second charging resistor R2 are connected with the output of circuit breaker Q F1 with the 3rd charging resistor R3, and the second contactor KM2 is connected with high pass passive filtering unit 202 outputs.The electrotimer that the second contactor KM2 of soft start unit 201 carries can be provided with the retarded closing time of the circuit breaker Q F1 combined floodgate back first contactor KM1 to reach the purpose of limiting starting current, after circuit breaker Q F1 closes a floodgate, compensation circuit is at first connected in soft start unit 201, the automatic adhesive of the first contactor KM1 when arrive the time of delay of setting, connect compensation circuit, soft start unit 201 is thereupon by the first contactor KM1 bypass.
Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection range of claims of the present utility model.
Claims (6)
1. the special-purpose low-voltage active electric power filter of a tobacco business, it is characterized in that, comprise the circuit breaker (QF1) that connects successively, high pass passive filtering unit (202), tri-phase iron core reactor (L4), three-phase inverter bridge circuit (203) and tank circuit (204), and control loop (205), described tri-phase iron core reactor (L4) and described three-phase inverter bridge circuit (203) constitute three-phase voltage source formula inversion circuit (206), the input of described control loop (205) is connected with the output of described circuit breaker (QF1), and its output is connected with the control end of described low pressure three-phase voltage source formula inversion circuit (206).
2. the special-purpose low-voltage active electric power filter of tobacco business according to claim 1, it is characterized in that, described control loop (205) is used for extracting the harmonic component of the load current of nonlinear load, sends it to described three-phase inverter bridge circuit (203).
3. the special-purpose low-voltage active electric power filter of tobacco business according to claim 2, it is characterized in that, described three-phase inverter bridge circuit (203) is used for generating extremely described tri-phase iron core reactor (L4) of the offset current opposite with its equal and opposite in direction, direction according to described harmonic component, wherein, described tank circuit (204) is as the voltage source of described three-phase inverter bridge circuit (203).
4. the special-purpose low-voltage active electric power filter of tobacco business according to claim 3, it is characterized in that, described tri-phase iron core reactor (L4) is used for the harmonic component of the offset current of the described three-phase inverter bridge circuit of filtering (203) generation, and exports the offset current that obtains after the filtering to the three-phase alternating current electrical network.
5. the special-purpose low-voltage active electric power filter of tobacco business according to claim 4, it is characterized in that, described high pass passive filtering unit (202) is used for the switch high-frequency component that filtering is produced by described three-phase inverter bridge circuit (203) from the offset current of described tri-phase iron core reactor (L4), and the offset current that obtains after the Filtering Processing is added to is used for three-phase alternating current, thereby form the compensating circuit of a closed loop to nonlinear load power supply; Described high pass passive filtering unit (202) comprises first air core reactor (L1), second air core reactor (L2), the 3rd air core reactor (L3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), first electric capacity (C1), second electric capacity (C2) and the 3rd electric capacity (C3), described first air core reactor (L1), the output of described second air core reactor (L2) and described the 3rd air core reactor (L3) is connected with an end of described first contactor (KM1), described first air core reactor (L1), the input of described second air core reactor (L2) and described the 3rd air core reactor (L3) is connected with the output of described tri-phase iron core reactor (L4), described the 4th resistance (R4), described the 5th resistance (R5), corresponding and described first electric capacity (C1) of one end of described the 6th resistance (R6), the one end serial connection of described second electric capacity (C2) and described the 3rd electric capacity (C3), described the 4th resistance (R4), described the 5th resistance (R5), the other end of described the 6th resistance (R6) is connected with the output of described tri-phase iron core reactor (L4), described first electric capacity (C1), the other end of described second electric capacity (C2) and described the 3rd electric capacity (C3) also connects.
6. the special-purpose low-voltage active electric power filter of tobacco business according to claim 5, it is characterized in that, comprise that also the one end is connected with the output of described circuit breaker (QF1), and first contactor (KM1) that the other end is connected with the output of described high pass passive filtering unit (202), described first contactor (KM1) two ends also are connected to soft start unit (201), described soft start unit (201) is by first charging resistor (R1), second charging resistor (R2), the 3rd charging resistor (R3), and respectively with described first charging resistor (R1), second contactor (KM2) that described second charging resistor (R2) is connected with described the 3rd charging resistor (R3) is formed, described first charging resistor (R1), described second charging resistor (R2) is connected with the output of described the 3rd charging resistor (R3) with described circuit breaker (QF1), and described second contactor (KM2) is connected with described high pass passive filtering unit (202) output; Described soft start unit (201) is used for coming limiting starting current by the closure that postpones described first contactor (KM1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205027830U CN201805228U (en) | 2010-08-24 | 2010-08-24 | Special low-voltage active power filter for tobacco industry |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205027830U CN201805228U (en) | 2010-08-24 | 2010-08-24 | Special low-voltage active power filter for tobacco industry |
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| CN201805228U true CN201805228U (en) | 2011-04-20 |
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| CN2010205027830U Expired - Lifetime CN201805228U (en) | 2010-08-24 | 2010-08-24 | Special low-voltage active power filter for tobacco industry |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300351A (en) * | 2016-09-09 | 2017-01-04 | 东南大学 | A kind of can the active filter of radio communication |
| CN106877332A (en) * | 2017-03-07 | 2017-06-20 | 合肥赛沃能源科技有限公司 | A kind of active filter and its method of work for shutting down automatic discharging |
| CN108604857A (en) * | 2015-12-15 | 2018-09-28 | 法国电力公司 | Improvement recharging device for being recharged to electrical equipment especially electric vehicle |
-
2010
- 2010-08-24 CN CN2010205027830U patent/CN201805228U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108604857A (en) * | 2015-12-15 | 2018-09-28 | 法国电力公司 | Improvement recharging device for being recharged to electrical equipment especially electric vehicle |
| CN106300351A (en) * | 2016-09-09 | 2017-01-04 | 东南大学 | A kind of can the active filter of radio communication |
| CN106877332A (en) * | 2017-03-07 | 2017-06-20 | 合肥赛沃能源科技有限公司 | A kind of active filter and its method of work for shutting down automatic discharging |
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Granted publication date: 20110420 |